Báo cáo lâm nghiệp: "Comparison between field performance of cuttings and seedlings of Eucalyptus globulus" ppsx

... the other hand, Lambeth et al. [19], in E. grandis and Menck and Table IV. Comparison of means (and associated F-test) between cuttings and seedlings and variances values for family and clones (and ... Field performance of cuttings and seedlings of E. Globulus 841 Kageyama [21] in E. saligna found a clear superiority of improved cuttings over unimproved...

Ngày tải lên: 08/08/2014, 00:22

... nodulation of Hippophae in England (Stewart and Pearson, 1967) and The Netherlands (Akkermans, 1971; Oremus, 1980) indicated that shrubs in old dune areas were often badly ... nematodes which seriously affect the growth of Hippophae seedlings, in spite of the presence of Frankia (Ore- mus, 1980; Oremus and Otten, 1981; Maas et al., 1983;...

Ngày tải lên: 09/08/2014, 04:20

... stocklots. Mean values and standard error. 3.2. Field performance and relationship to RGP and seedling quality The performance of seedling stocklots in both locations dif- fered between sites (Fig. ... expression of the RGP; and (iii) to examine the relationship between RGP and field performance on two contrasting sites. 2. MATERIALS AND METHODS 2.1. Plant material...

Ngày tải lên: 07/08/2014, 16:21

... acidification of soil solution and the leaching of basic cations of Ca and Mg from soil. is study aims to compare impact of 20 year last- ing cover of blue spruce, and clear-cut reed Calama- grostis villosa ... total amount of nutrients in humus per ha we found no significant differences. In CV, average (Horn’s mean) content of potassium was 20% higher (87 and 71 kg/ha...

Ngày tải lên: 07/08/2014, 03:22

... Diseases of Trees and Shrubs. Ithaca, Cornell University Press: 574. SIWECKI R., UFNALSKI K., 1998. Review of oak stand de- cline with special reference to the role of drought in Poland. European ... samples of leaves and cupules for species identification were easily taken away from upper insolated parts of crowns of the previously measured trees. After that, diameters at...

Ngày tải lên: 07/08/2014, 03:22

... deposition fluxes of Ca, Mg, K, S-SO 4 , N-NO 3 and N-NH 4 in the dense and sparse spruce stand were 15.7 and 11.6, 4.2 and 3.0, 19.2 and 12.7, 22.5 and 16.4, 8.9 and 7.4, 7.7 and 6.6 kg/ha, ... in throughfall and rainfall sums were the result of different leaf area index and stand density of the studied stands. Water intercepted by the stand canopy of the sp...

Ngày tải lên: 07/08/2014, 04:20

... Quarterly Journal of Forestry, 72: 207–210. LIU S., CORCORAN T.J., 1993. Road and landing spacing under the consideration of surface dimension of road and landings. International Journal of Forest ... researchers. Logging method, price of products, taxation policies, landing costs, overhead costs, equipment opportunity costs, width of road and the size of landing, sk...

Ngày tải lên: 07/08/2014, 04:20

... between plants roots and fungi) are important phenomenon in all debates about a nutrition and growth of trees. Stability and funcionality of forest ecosystems depend on aggregate impacts of ... Average values of defoliation decreased slightly between 2006 and 2007 perhaps as a result of increased fall of needles in 2007 due to low precipita- tion between Septemb...

Ngày tải lên: 07/08/2014, 04:20

... sylvatica dominance of food-attractive species PD of Fagus sylvatica (% of damaged) –0.155 –0.069 DifPD of Fagus sylvatica (differences PD sp and PD all ) –0.040 –0.360 RPD of Fagus sylvatica (rate of PD sp and ... under a stand were monitored up to a height of 150 cm and the presence of new browsing damage was monitored. Differences between the percent of damaged...

Ngày tải lên: 07/08/2014, 10:21

... e dry weight of root systems and shoots, i.e. the dry weight of stem and branches and total dry weight of needles, was markedly lower in plugs. e mean dry weight of one needle and needle density ... plant growth and dynamics of stands (C et al. 1994). e values of Fo (minimum fluorescence at all re- action centres of photosystem II when open) and Fm (maximum...

Ngày tải lên: 07/08/2014, 10:22